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Hey everyone -- thought I'd revive an older thread. I'm back with more (I think) harness issues. After solving my camera fault issues for months with the fuse tap, I did the latest Rivian software update (2026.15.0) with the Comma disconnected from the vehicle, but with the harness in place...

Right, sorry. Should have been more specific. I have the 3X. Safe to assume then that this harness will work?

The site says that a Comma 4 is required. Any idea if this will work with the Comma 3?

Amazing! I'll check that out.

I adore my comma on my Gen 1, and would love to use it with my Gen 2 as well. Are we still waiting on a harness to be available for that to be possible? Universal hands free is nice, but I’ve already bought the comma hardware, and I’m not in a hurry to spend another $2500 to get the same...

yeah, great. I removed the AXM power from the harness. Trying to source a fusetap now.

I'd love a fusetap. Happy to pay for shipping+ whatever it costs.

The more I think of it, the more I think I'm suffering from the wake conflict issue. Is there a generally accepted option for a fuse tap with the standard comma harness?

Yup, thanks! Getting one of those today.

I had an extra harness. Removed the power wires, and I’ll try swapping it with the other one tomorrow.

Thanks guys! I already took the magnetic mount out of the equation. The USB connection from the harness is connected directly to a comma. I left them out, purely to attach the device to the windscreen. I think the power option is the most promising. Whenever the truck sleeps for a prolonged...

The harness and/or the Comma device is really starting to drive me nuts. After re-seating all the connections, flashing the device, I managed to get ~300 miles of driving without the constant front sensor and front camera errors. I thought I was home free. On the drive home (~4 days later)...

On 20" tires and very soft sand, I'd go closer to 20 or 25.

Hey friends, After a few months of near flawless operation, I've run into a conistent issue where the Comma is seemingly affecting operation of the ADAS unit. A few minutes after engaging, the car complains that the front camera and sensors are unavailable. At first, they'd come back...

Santa Barbara

I’m interested, but out of town until Friday.

I bought two harnesses, but only used one (I traded one Gen 1 for a Gen 2). Save yourself a few bucks and buy mine. It’s brand new. Asking $50

I have a harness installed in my R1S and R1T. I was moving the Comma between the two with a magnetic mount and it's been working GREAT. I'm trading my R1S for a Gen2 tomorrow, and I'm already anticipating missing Openpilot. I am very willing to be a guinea pig for a Gen2 port.

I'm selling a set of Ram wheels, painted black, in flawless condition. They are ready to go with Nokian Nordman winter tires (275x60x20). I used them for a single season to commute between Santa Barbara and Mammoth. Tons of life left. I'd consider selling the wheels w/o the tires, too.

The wheels look awesome! I'm interested and based in Santa Barbara. I'm in Mammoth most weekends, too.